Sleeve-type Torque Sensor Based on Effect of Strain Induction Applied to Wide-blade Drill Rod

To obtain the dynamic torques exerted at different location points on a wide-blade drill rod, a sleeve-type torque sensor is proposed and designed. Firstly, the relationship model between torque and voltage is built on the basis of a mechanical theory. The sensor is designed on the basis of the effect of strain induction, and its structure is designed according to the structural type of the wide-blade drill rod. Furthermore, the deformation of strain gauges is determined by finite element analysis, and the relationship between strain and torque is established. Secondly, the modal analysis of the torque sensor is performed. The hardware circuit for detecting torque is designed. Finally, the performance test is performed and, according to the test results, the performance of the sensor meets the requirements of actual working conditions. Therefore, torque can be measured using a torque sensor for the drill rod, which helps solve the problem of drill rod sticking in underground coal mine.